SpectrTech Wedding Planner: A full wedding planner in one offline HTML file

Hi Product Hunt 👋 I'm Napis, and I build small offline tools that ship as a single HTML file. This is the first one. Why: most wedding planners are free because the couple is the product — vendor leads, registry commissions, ads. I wanted the opposite: pay once, keep the file, and your guest list never leaves your computer. What's inside: 17 sections that share the same data. Add a guest once and they show up in RSVPs, the seating chart, meal counts and invitations. Auto Arrange seats confirmed guests by group, keeps "together" pairs at one table and "apart" pairs at different ones, and seats VIPs first. Invitations export as one PDF per guest, packed into a ZIP. The interface speaks 9 languages, including Arabic (RTL), Chinese and Hindi. Honest limits: it runs in desktop browsers (not on phones yet), there's no cloud sync, and your data lives in the browser — so the app nags you to download a backup file. There's a free demo with exports disabled: https://spectrtech.github.io/demo/ I'd really value feedback on two things: 1. Does "one offline file" make you trust a tool more, or less? 2. What would you need to see before paying $24.99 for a planner? Thanks for taking a look!